It’s because Telosys cannot found the DB2 JDBC driver. Telosys tries to load the JDBC driver from the project classpath (if the project is a Java project) and from the “TelosysTools/lib” folder. So just add it in the classpath (or in the pom.xml for a Maven project) or copy the jar file in the “lib” folder. In the “.dbcfg” editor click the button “Show libraries” to check if the jar is in the list.

By the way, my telosys version is 2.1.1 and eclipse version is Neon.
Telosys worked fine with derby without any problems.
Then I tried the same steps with a DB2 database.
At the database connection configuration step it failed, I cannot move further.
However, I already created a db2 database connection in the eclipse itself without any problem. (after uploading db2 jdbc drivers of course)
I am looking forward to your suggestions.

Exception com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the tight syntax to use near'match WHERE 1=0 at line 1

In Oracle Long, Integer, Byte, Boolean , Float, BigIntiger, BigDecimal all can be stored as NUMBER with scale and precision. There needs a way of telling this tool based on scale an precision map to configurable Java type. Is there a way